Symfony2 :FOS:elastica populate fails for serializer with callback - symfony

Question

I am using symfony LTS with master FOS:elastica and master jms_serializer.
Config
fos_elastica:
clients:
default: { host: %elastic_host%, port: %elastic_port% }
serializer:
callback_class: FOS\ElasticaBundle\Serializer\Callback
serializer: serializer
indexes:
c_search:
client: default
types:
adverts:
mappings:
id:
type: integer
user:
type: string
Media:
type: nested
properties:
urlMedia: ~
persistence:
driver: orm
model: WebSite\MyBundle\Entity\Advert
provider: ~
listener: ~
finder: ~
Populate
php app/console fos:elastica:populate
This command work without any problem before I added the lines below. When I try to run "php app/console fos:elastica:populate" there is an infinite loop since I have added these lines:
serializer:
callback_class: FOS\ElasticaBundle\Serializer\Callback
serializer: serializer
Troubleshooting:
After this I made a simple request (without serialize because of my problem) like this on my controller :
public function testAction()
{
$repositoryManager = $this->container->get('fos_elastica.manager');
$repository = $repositoryManager->getRepository('WebSiteMyBundle:Advert');
$data = json_encode($repository->find('68200'));
return $this->render('WebSiteMyBundle:Default:test.html.twig', array(
'test'=> $data,
));
}
On my result test there is like 5 empty arrays. I know the result is good since there is normaly 5 response in my raw request but I can't find the solution to show the real content if anyone have an idea.

Answer 1

Ok, I was right in my comment, this issue was related to serializer and is quite logical.
Actually, if you do not specify anything, elastic will index every property and every relation in cascade which is a problem when having some circular references.
Here is what you could do to fix you problem :
First, add some properties in your group :
<?php
namespace WebSite\MyBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use JMS\Serializer\Annotation as Serializer;
/**
* Advert
*
* #ORM\Table(name="advert")
*/
class Advert
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #var string
*
* #ORM\Column(name="title", type="string", length=55)
* #Serializer\Groups({"elastica"})
*/
private $title;
...
Then, add this in your config file :
fos_elastica:
clients:
default: { host: %elastic_host%, port: %elastic_port% }
serializer:
callback_class: FOS\ElasticaBundle\Serializer\Callback
serializer: serializer
indexes:
c_search:
client: default
types:
adverts:
serializer:
groups: [elastica]
mappings:
id:
type: integer
user:
type: string
Media:
type: nested
properties:
urlMedia: ~
persistence:
driver: orm
model: WebSite\MyBundle\Entity\Advert
provider: ~
listener: ~
finder: ~
Then, you shouldn't have any circular reference and only having title property in your elasticsearch index.
Good luck.